July 2025: Delivered rigorous test-driven improvements for NHSDigital/dtos-cohort-manager, strengthening data integrity, API reliability, and reporting stability. Focused on comprehensive cohort feature tests, BS Select integration readiness, and robust input validation, underpinned by stabilized test infrastructure and clear data governance.

June 2025 focused on strengthening test automation stability and data quality for NHSDigital/dtos-cohort-manager. Key work included migrating Epic high-priority regression tests to a new runner workflow to improve execution efficiency and organization, enhancing cohort management test data and scenarios with NHS data alignment, advancing API testing with error tracing and improved logging, and cleaning up/test infrastructure documentation to reduce maintenance overhead.

May 2025 — NHSDigital/dtos-cohort-manager: - Testing Infrastructure Improvements: Restored missing test data files and migrated smoke tests to a new runner workflow, enhancing reliability and speed of test cycles. - Epic 3 Reason-for-Removal Logic Tests: Added tests ensuring the reason-for-removal logic does not trigger for non-target reasons and introduced a data service for fetching exception records. - End-to-End Testing for BS Select and Cohort Management: Implemented comprehensive E2E tests for BS Select API and cohort management, covering IsExtracted handling, 204 responses, audit logging, and invalid date scenarios across core data flows. These efforts collectively improved test reliability, reduced regression risk, and strengthened release confidence by delivering targeted test improvements and end-to-end coverage.

April 2025: Delivered a Playwright-based End-to-End Testing Framework for Cohort Management with API-driven validation, externalized test data, and CI/CD integration, enabling faster feedback and more reliable releases. Added Cohort Distribution API Test Suite for BS Select API (ADD and AMENDED scenarios). Expanded Cohort Management Regression and Participant Data Validation coverage, including name prefix rules, GP Practice Code Exception flag data, and epic1 high-priority regression tests. Migrated DB checks to API where feasible to reduce DB dependencies and improve test reliability. Overall impact includes increased release confidence, faster validation cycles, and better data quality control.

March 2025 monthly summary focusing on reliability, test automation, and pipeline optimization across the dtos-cohort-manager and dtos-devops-templates repositories. Key outcomes include resolving Mac Docker startup issues, upgrading the test automation framework, expanding end-to-end test coverage, and parameterizing E2E tests in CI pipelines to enable dynamic test configuration.